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Home >> Mitsubishi >> 1988 >> Precis LS, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Operation >> Controlled Systems >> Spark Control
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Spark Control

To decrease hydrocarbons and improve driveability, a dual chamber vacuum advance is used. The advance unit is operated by vacuum controlled by ECU and 2 control solenoids. The ECU opens or closes the solenoids to provide ported or manifold vacuum to regulate ignition advance.

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